1. 余像：aftersales 出售以后的 | aftersensation 余像 | aftershaft 后羽
2. 后觉：afterripening后热 | aftersensation后觉 | aftertest后测
3. 后感觉：afterpains 产后痛 | aftersensation 后感觉 | aftertreatment 后疗法
noun
1. an image (usually a negative image) that persists after stimulation has ceased
Synonym: afterimage